Winchester Defender 12G Caliber: 12G Capacity: 5+1 Inertia-Assisted Pump Action: Dual-action bars combine with an innovative rotary bolt to spring the action partially open after a shot, allowing for incredibly fast follow-up shots. Barrel & Capacity: Features a tactical 18.5" barrel (fixed cylinder or Invector-Plus choke) holding 5+1 rounds (accommodating both 2 3/4" and 3" shells). Durable Construction: Built with a hard chrome-plated chamber/bore and black chrome internal components, offering exceptional resistance to wear and corrosion. Rotary Bolt: Utilizes a four-lug rotary bolt that locks securely into the barrel extension for enhanced structural strength